Mounting of fuel-feeding components in liquid-fuel burners



G. HUBER 3,262,290

MOUNTING 0F FUEL-FEEDING COMPONENTS IN LIQUID-FUEL BURNERS July 26, 1966Filed Feb. 10, 1964 Geo/"g Huber by I a zomey 2 United States Patent3,262,290 MOUNTING OF FUEL-FEEDING COMPONENTS IN LIQUID-FUEL BURNERSGeorg Huber, Starnberg, Upper Bavaria, Germany, assignor to Webasto WerkG.m.b.H., Stockdorf, near Munich, Germany Filed Feb. 10, 1964, Ser. No.343,752 Claims priority, application Switzerland, Mar. 14, 1963,3,228/63 6 Claims. (Cl. 67-55) The invention relates to the mounting offuel-feeding components in liquid-fuel burners, and is concerned withfastening a wick stone in a fuel storage container from which liquidfuel is fed by way of the wick stone to a burner, the upper part of thewick stone being arranged inside a tubular socket provided in thestorage container and hearing by its upper end against a burning wick.

Burners of this type have the advantage that in multiple production theeffect of the wick stone is to ensure an equal burner efiiciency for theindividual burners, while nevertheless, owing to the use of the burnerwick, allowing a widely extended flame to be obtained, and enablingsuflicient air for combustion to be supplied even in the case ofrelatively great burner output.

One of the major difiiculties associated with this advantageous type ofwick burner however, arises in the fastening of the wick stone (which asa rule has hitherto been held in very narrow guide means surrounding theupper part of the wick stone). The fastenings hitherto proposed havebeen sensitive to knocks against the burner, when the wick stone waseasily liable to be broken off and thus become unusable.

It has accordingly been proposed to provide, between the tubularmounting for the wick stone and the part of the wick stone lying insidethe same, an elastic member by which the wick stone was held in saidmounting. By this means, the danger of easy breakage of the wick stoneby knocks against the burner was reduced, but there still remained thedifliculty that the connection between the wick stone and burning wickmight no longer remain entirely satisfactory for the reason that thewick stone together with the elastic holding means inside the socketwere inclined to slip down. This was liable to happen after extended useof the burner.

The object of the present invention is to provide a fastening means forthe wick stone which will afford not only a shockproof retention of thewick stone but also an entirely satisfactory connection even after longperiods of use between wick stone and burner wick.

The invention consists in a liquid-fuel storage tank for a burnercomprising a wick stone located in a socketlike housing in the tank, andwherein the wick stone is prevented -from downward slipping by a supportattached to the socket-like housing and extending beneath the wickstone.

A simple form of fastening consists in a U-shaped stirrup having bothits upper ends bent outwards and said bent ends are mounted in boresformed in the socket. The socket together with the wick fixed thereinand the stirrup can then be screwed into the container if no stirrupparts project in the thread.

A good connection between burner wick and wick stone is achieved if theburning wick is pressed by means of a spring against the wick stone andpresses the latter against the U-shaped stirrup. This form ofconstruction also permits considerable manufacturing tolerances, thusreducing production costs without adversely affecting the functioning ofthe appliance.

Between the wick stone, and the stirrup securing the latter againstslipping down, it is also possible, according to a further feature ofthe invention, to clamp a textile wick, which in the first place servesfor the complete utilisation of the contents of the tank and in thesecond place offers advantages in the feeding of fuel at lowtemperatures.

In the following description are set out details of a fastening deviceaccording to the invention, with the aid of which other features of theinvention will appear. This form of the invention is illustrated in theaccompanying drawing wherein FIGURE 1 shows, in section, a wick burnerwith a fastening means constructed according to the invention for thewick stone, while FIGURE 2 illustrates, in plan view, the burner wickand the basin receiving the same of the wick burner shown in FIGURE 1.

As can be seen in FIGURE 1, fuel is fed through a wick stone 4 from astorage tank 5 to a burner 1 by way of a burner wick 2 which is providedinside a wire mesh 3 and consists, for example, of an asbestos fabric.The wick stone 4 is mounted in a tubular socket 6 which can preferablybe screwed into the storage tank 5. Inside the socket 6 the wick stone 4is supported by an O-ring 7 and is secured against slipping down by aU-shaped wire stirrup piece 8. This wire stirrup is bent outwards at itsupper ends 9, 10 these bent ends being seated in bores of the socket 6so that the stirrup 8 can be inserted together with said socket into thecontainer 5.

Between the stirrup 8 and wick stone 4 is clamped a textile wick 11 bywhich it is possible to draw up fuel lying at the bottom of the tankwithout its being necessary for the wick stone to stand on the bottom.In the figure this textile wick 11 is shown as drawn like a stockingover the wick stone 4 and is held against it simply by the lateralstirrup arms. It could of course alternatively be clamped between theend of the wick stone 4 and the base of the stirrup, which would offeradvantages in respect of the elasticity of the fastening but would havedrawbacks in respect of the manufacturing tolerances which would then berequired.

In many cases it is expedient for the wick stone to be protected by thelateral stirrup arms against bending forces, such as occur for examplethrough lateral impact against the storage tank.

In order to ensure that the burner wick 2 is well pressed against theupper end of the wick stone 4, there is provided inside the bowl 12accommodating the burner wick 2 (which bowl is further illustrated, inFIGURE 2, in plan view), a spring 13 which is supported against aretracted portion 14 of the bowl 12 and presses the burner wick 2against the wick stone 4.

The invention is not restricted to the exemplified embodiment thereofhere described but can also be put into practice with modification ofthe different parts, particularly of the stirrup fastening and thespring, without departing from the scope of the invention.

What I claim is:

1. A liquid-fuel storage tank for a burner comprising a wick stonesupported at the top by an O-ring disposed within a socket-like housingin the top wall of the tank, said wick stone being spaced from the wallof said housing and from the bottom of said tank, and a bottom supportattached to the socket-like housing and extending beneath the wick stonewherein the wick stone is prevented from downward slipping.

2. A tank as claimed in claim 1 comprising a burner wick which ispressed by means of a spring against the top of the wick stone andpresses the latter against its support, such as a U-shaped stirrup.

3. A tank as claimed in claim 2 wherein the spring pressing the burnerwick against the wick stone is provided inside a bowl accommodating theburner wick, and over the burner wick, and is held in a retractedportion formed in said bowl.

4. A tank as claimed in claim 1 comprising a textile wick clamped aboutthe wick stone between the wick stone and its bottom support, such as aU-shaped stirrup memher.

5. A fuel storage tank fitted with a vertically disposed wick stone bywhich liquid fuel is led to a burner, the upper part of the wick stonebeing arranged inside a tubular socket provided on the storage tank andbearing by its upper end against a horizontally disposed burner wick,comprising a compressed elastic member between the socket and the partof the wick stone located therein, and attached to the socket a U-shapedbent stirrup piece on which the bottom of the wick stone rests and issecured against slipping down.

6. A tank as claimed in claim 5 wherein the U-shaped 4 stirrup piece hasits two upper ends bent outwards and said bend ends are mounted in boresformed in the socket.

References Cited by the Examiner UNITED STATES PATENTS 12,814 5/1855Chamberlain 6755 203,443 5/ 1878 Haedicke 6770 X 1,044,041 11/1912Fusner 6755 FOREIGN PATENTS 356,016 9/1905 France. 639,668 12/1936Germany.

4,948 1900 Great Britain. 11,157 1884- G-reat Britain. 174,620 1/ 1922Great Britain.

FREDERICK L. MATTESON, 111., Primary Examiner. 1

R. A. DUA, Assistant Examiner.

1. A LIQUID-FUEL STORAGE TANK FOR A BURNER COMPRISING A WICK STONESUPPORTED AT THE TOP BY AN O-RING DISPOSED WITHIN A SOCKET-LIKE HOUSINGIN THE TOP WALL OF THE TANK, SAID WICK STONE BEING SPACED FROM THE WALLOF SAID HOUSING AND FROM THE BOTTOM OF SAID TANK, AND A BOTTOM SUPPORTATTACHED TO THE SOCKET-LIKE HOUSING AND EXTENDING BENEATH THE WICK STONEWHEREIN THE WICK STONE IS PREVENTED FROM DOWNWARD SLIPPING.